diff --git a/Project/applications/smartcities/include/json.h b/Project/applications/smartcities/include/json.h
index aeae30c..073cb9a 100644
--- a/Project/applications/smartcities/include/json.h
+++ b/Project/applications/smartcities/include/json.h
@@ -3,9 +3,11 @@
 
 #include <string.h>
 #include <stdint.h>
-#include "httpClient.h"
-#include "libwismart.h"
-#include "ch.h"
+#include "globals.h"
+#include "sensors.h"
+#include "module.h"
+#include <string.h>
+#include <stdio.h>
 
 #define	JSON_POST_OK		0
 #define	JSON_COMM_ERROR		1
@@ -15,10 +17,10 @@
 #define JOIN_FREE_MEM		1
 
 char* prepare_json_statement(char** data, uint32_t nObservations);
-char* prepare_json_register_statement(char* module_ID, uint8_t sensor_type);
+char* prepare_json_register_statement(module mod, sensor sens);
 char* prepare_observation(char* observation, uint32_t length);
 uint8_t send_observation(char* statement, uint32_t length, char* provider_ID, char* sensor_ID);
 uint32_t find_next_index(char* string, uint32_t length, char delimiter);
-char* join_strings(char* str1, char* str2, uint32_t len1, uint32_t len2, bool)
+char* join_strings(char* str1, char* str2, uint32_t len1, uint32_t len2, uint8_t free_mem);
 
-#endif
+#endif
\ No newline at end of file
diff --git a/Project/applications/smartcities/include/module.h b/Project/applications/smartcities/include/module.h
index 84be2f8..dbda733 100644
--- a/Project/applications/smartcities/include/module.h
+++ b/Project/applications/smartcities/include/module.h
@@ -1,11 +1,12 @@
 #ifndef MODULE_H
 #define MODULE_H
 
-typedef struct module_info {
+typedef struct module_info module; 
+struct module_info {
   char* ID;
   char* geoloc;
-} module_info;
+};
 
-module_info module = {"123456", "41.39479 2.148768"} /* append 0/1 flag for read write */ 
+extern module mod;
 
-#endif
\ No newline at end of file
+#endif
diff --git a/Project/applications/smartcities/include/sensors.h b/Project/applications/smartcities/include/sensors.h
index 6ad402d..b4192e4 100644
--- a/Project/applications/smartcities/include/sensors.h
+++ b/Project/applications/smartcities/include/sensors.h
@@ -1,14 +1,18 @@
 #ifndef SENSORS_H
 #define SENSORS_H
 
-typedef struct sensor_info {
+#include <stdint.h>
+
+
+typedef struct sensor_info sensor;
+struct sensor_info {
   uint8_t ID;
   char* description;
   char* type;
   char* unit;
-} sensor_info;
+};
 
-sensor_info humidity_sensor = {ID = 0x77, "Humidity sensor", "humidity", "%"} /* append 0/1 flag for read write */ 
+extern sensor humidity_sensor;
 
 
 #endif
\ No newline at end of file
diff --git a/Project/applications/smartcities/json.c b/Project/applications/smartcities/json.c
index f5d4ab2..9a34008 100644
--- a/Project/applications/smartcities/json.c
+++ b/Project/applications/smartcities/json.c
@@ -19,40 +19,40 @@ char* prepare_json_observation_statement(char** data, uint32_t nObservations)
 	return json_statement;
 }
 
-char* prepare_json_register_statement(module_info module, sensor_info sensor)
+char* prepare_json_register_statement(module mod, sensor sens)
 {
 	unsigned int i, length, observation_length;
 	char *json_statement, *str_aux, *str_aux2;
+	char ID[MODULE_ID_LENGTH+3];
 	length = 23;
-	char* ID[MODULE_ID_LENGTH+3];
-	strcpy(ID,module.ID);
-	sprintf(ID+MODULE_ID_LENGTH,"%d",sensor.ID);
+	strcpy(ID,mod.ID);
+	sprintf(ID+MODULE_ID_LENGTH,"%d",sens.ID);
 	str_aux = join_strings("{\"sensors\":[{\"sensor\":\"",ID,length,MODULE_ID_LENGTH+2,JOIN_NO_FREE);
 	length += MODULE_ID_LENGTH+2;
 	str_aux2 = join_strings(str_aux,"\",\"description\":\"",length,17,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	length += 17;
-	str_aux = join_strings(str_aux2,sensor.description,length,strlen(sensor.description),JOIN_NO_FREE);
+	str_aux = join_strings(str_aux2,sens.description,length,strlen(sens.description),JOIN_NO_FREE);
 	chHeapFree(str_aux2);
-	length += strlen(sensor.description);
+	length += strlen(sens.description);
 	str_aux2 = join_strings(str_aux,"\",\"type\":\"",length,10,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	length += 10;
-	str_aux = join_strings(str_aux2,sensor.type,length,strlen(sensors.type),JOIN_NO_FREE);
+	str_aux = join_strings(str_aux2,sens.type,length,strlen(sens.type),JOIN_NO_FREE);
 	chHeapFree(str_aux2);
-	length += strlen(sensors.type);
+	length += strlen(sens.type);
 	str_aux2 = join_strings(str_aux,"\",\"unit\":\"",length,10,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	length += 10;
-	str_aux = join_strings(str_aux2,sensor.unit,length,strlen(sensor.unit),JOIN_NO_FREE);
+	str_aux = join_strings(str_aux2,sens.unit,length,strlen(sens.unit),JOIN_NO_FREE);
 	chHeapFree(str_aux2);
 	length += strlen(sensor.unit);
 	str_aux2 = join_strings(str_aux,"\",\"location\":\"",length,14,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	length += 14;
-	str_aux = join_strings(str_aux2,module.geoloc,length,strlen(module.geoloc),JOIN_NO_FREE);
+	str_aux = join_strings(str_aux2,mod.geoloc,length,strlen(mod.geoloc),JOIN_NO_FREE);
 	chHeapFree(str_aux2);
-	length += strlen(module.geoloc);
+	length += strlen(mod.geoloc);
 	json_statement = join_strings(str_aux,"\"}]}\0",length,5,JOIN_NO_FREE);
 	chHeapFree(str_aux);
 	return json_statement;
diff --git a/Project/applications/smartcities/module.c b/Project/applications/smartcities/module.c
new file mode 100644
index 0000000..527afc7
--- /dev/null
+++ b/Project/applications/smartcities/module.c
@@ -0,0 +1,3 @@
+#include "module.h"
+
+module mod = {"123456", "41.39479 2.148768"}; /* append 0/1 flag for read write */ 
\ No newline at end of file
diff --git a/Project/applications/smartcities/sensors.c b/Project/applications/smartcities/sensors.c
new file mode 100644
index 0000000..b4517b4
--- /dev/null
+++ b/Project/applications/smartcities/sensors.c
@@ -0,0 +1,3 @@
+#include "sensors.h"
+
+sensor humidity_sensor = {0x77, "Humidity sensor", "humidity", "%"}; /* append 0/1 flag for read write */